Mechanism for type-writers for coupling the paper-cylinder to the line-spacing wheel.



I T. E. BUSCHMANN. MECHANISM FOR TYPE WRITERS FOR COUPLING THE PAPERCYLINDER TO THE LINE SPACING WHEEL.

APPLICATION FILED JUNE-18, 1913.

Patented Aug. 31, I915.

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.THEODOR EUGEN IBUSCHMANN, OF CHEMNITZ, GERMANY, ASSIGNOR TO THE FIRM F WANDERER-WERKE, VORM. WINKLHOFER & JAENICKE, AKT.-GES., -01? GHEMNITZ,

GERMANY.

MECHANISMFOR TYPE-,WBTTERS FOR COUPLIN THE PAPER-CYLINDER TO THE LINE- SPACING WHEEL. v

Application filed June 18, 1913. Serial Nol 774,401.

To all whom it may concern; r

Be it known that I, THEODOR EUGEN BUSCHMANN, mechanical engineer, a subject 'of the'Emperor of Germany, and a resident of Chemnitz, Saxony, Germany, have mfvented certain new and useful Improvements in Mechanism for Type-VVriters for Coupling the Paper-Cylinder to the Line- Spacing Wheel, of which the following is a specification. x p

This invention relhtesto a mechanism'for I typewriters forcoupli'ng the platen with the line-spacing wheel as described in my pre vious Letters Patent No. 993025 and has for its object to attain a further development of this mechanism byan arrangement by means of which the platen can be held unpou'pled from thdlihe-spacing wheelfor any desired period without a permanent pressure on the pressure head of the uncoupling bolt being necessary.

One construction of the invention is illustrated by way of example in the accompanying drawings, in whidh Figrre 1 is a longitudinal section through a coupling mechanism in the operative position. 'Fig. 21is a similar, illustration but showing the line-spacing wheel uncoupled. Figs. 3 and at show the sections corresponding to Fi 1 and 2.

-i3 is the platen axle which is formed in one piecewith the carrier-.6 for the clutch clamping rollers, in the'form of construction being dealt with. In the periphery ofthis carrying body 5, oppositely directed clutch-roller cages 10 and 11 are milled out for receiving the clutch-rollers 19. The

clutch-rollers 19 are provided with longitudinally directed hples and are thus similar in form to tubes, whereby resiliency is obtained. After milling out the previously mentioned cages 10 and 11, projections 12 remain on the periphery of the carrying,

*. body 5 through which projections holes are bored in which are guided spiral springs 20 which endeavor to press the clutch-rollers 19 against the inner wall of the annular linespacing wheel 17. Further, in the carrying body 5 are bored radially-directed holesin which are guided wedge pins 21 which arearranged with .their wedge-shaped points between each pair of, clutch-rollers 19. Finally, the carrying body is provided Specification of Letters Patent.

a the fallin Patented Aug. 31, 1915.

longitudinal direction with a hole which is pierced through by another radially drilled hole. In the longitudinal hole is guided the.

hollow bolt 22, which at its end forms a shallow cone and which, also, is provided with a longitudinal hole in which is located a compression spring 23- which presses against a pin 24 arranged in the carrying 18 arranged in the interior of the body 5 .so that there is always an effort to press tl1e-hpllow 'bolt 22 outward (i.- e.

this hollow bblt 22 operates the enlarged part 30 of the shaft 30 which carries the pressure button 31. Theshaft 30 may be enlarged to the part 3O by means of a cone' shaped surface on which theclutch balls 34, which are arranged in the cross-bore of the handle pivot 28, may slide down. The handle pivot 28 is surrounded by a coupling sleeve 33-which at the same time prevents out of the clutch balls 34:. The sleeve 33 is further provided with a flat groove 35 (Fig. 1) in. which enter the clutch balls 34; in order to prevent an unintentional movement of the sleeve (see Fig. 2).

The operation of the mechanism "characterizing this invention is as follows: in the normal position the couplin sleeve 33 which surrounds the hand1whee pivot is in the position-shown in Fig. 1 so that, corresponding to'my Patent No. 993025, the uncoupling can bectiected by pressure on the in the cages 10 and 11 against the inner wall of the line-spacing wheel 17. When the untoward'the right in Figs. 1 and 2). Against coupling bolt is pushed to the left by means i of the button 31, shaft 30 and 30, the cone at the end of this uncoupling bolt 22 presses the wedge pins 21 apart, thus causing the .clutch-rollersvlt) to be forced back into the cages against the action of the springs 20, so That, the carrier 5, the clutelprollers l9 andtheinner wall of the linespaeing whee 17 are no longer coupled together (see Fig- 4). If now it is desired to keep these parts I uncoupled for a lengthened periqd, the sleeve 33 ispressed to the left. Thus it is effected that the locking balls 34 which can slide down on the cone-surface of a thickened part of the pivot 30, slide into the cross-bore of the hand-wheel pivot and are held se- Yzum'lly in their inner position so that the shaft 30 cannot return into its normal posi-. tion when the button 31 is released, and thus the uncoupling bolt 22 is held, against the, action of the spring 23 in its operative position as shown in Fig. 2.

I claim- 1. In a typewriter platen spacing mechanism, the combination with an annular spacing Wheel, a carrier, clutch rollers, normally urged into clutching act on, radially directed wedge-pins in said carrier to move the rollers out of clutching operatiiin, a shaft having an enlargement for moving said wedge-pins and normally spring-urgedout of engagement therewith, a hand wheel pivot secured to said carrier in which said shaft is longitudinally movable and having radial openings therein, means in said openings for engaging the shoulder formed by said enlargement and means for locking the aforesaid means in engaging position.

2. In a type-Writer platen spacing mechanism, the combination With an annular spacing wheel, of a normally urged into clutching action, radially directed wedge-pins in said carrier to move the rollers out of clutching operation,

a shaft having an enlargement for moving said wedge-pins and normally spring urged out of engagement therewith, a hand wheel pivot secured to said carrier in which said shaft is longitudinally movable, and having radial openings therein, balls in said open ings for engaging the shoulder formed by said enlargement, and a sleeve for locking the aforesaid balls in engaging position.

In a type-Writer platen spacing mechanism, a hollow hand wheel pivot, a hand wheel rigidly secured thereon, a spring urged shaft axially movable'in said pivot and having a headed end on one side of said hand Wheel, and an enlargement forming a shoulder, said pivot having radial openings, locking balls in said openings, a sleeve on said pivot havingtwo internal grooves therein of different depths, one of said grooves engaging the balls and holding them 'n locking position against 'said shoulder and also operating to prevent the movement of the sleeve out of its locking position, and the other groove arranged to permit the balls to move out of locking position.

In testimony whereof I have aflixed my signature.

rnnonon EUGEN BUSCHMANN.

In the presence of- EMIL Srnenn, WALTER KoHLnn.

carrier, clutch rollers 

